Improving Ammonia Detecting Performance of Polyaniline Decorated rGO Composite Membrane with GO Doping
Yubin Yuan, Haiyang Wu, Xiangrui Bu, Qiang Wu, Xuming Wang, Chuanyu Han, Xin Li, Xiaoli Wang, Weihua Liu
Abstract
Gas-sensing performance of graphene-based material has been investigated widely in recent years. Polyaniline (PANI) has been reported as an effective method to improve ammonia gas sensors’ response. A gas sensor based on a composite of rGO film and protic acid doped polyaniline (PA-PANI) with GO doping is reported in this work. GO mainly provides NH3 adsorption sites, and PA-PANI is responsible for charge transfer during the gas-sensing response process. The experimental results indicate that the NH3 gas response of rGO is enhanced significantly by decorating with PA-PANI. Moreover, a small amount of GO mixed with PA-PANI is beneficial to increase the gas response, which showed an improvement of 262.5% at 25 ppm comparing to no GO mixing in PA-PANI.